fix(quality): Ruff/CVE/TS-Fixes, 104 neue Tests, Complexity-Refactoring

- Ruff: 144 auto-fixes (unused imports, == None → is None), F821/F811/F841 manuell
- CVEs: python-multipart>=0.0.22, weasyprint>=68.0, pillow>=12.1.1, npm audit fix (0 vulns)
- TS: 5 tote Drafting-Engine-Dateien entfernt, allowed-facts/sanitizer/StepHeader/context fixes
- Tests: +104 (ISMS 58, Evidence 18, VVT 14, Generation 14) → 1449 passed
- Refactoring: collect_ci_evidence (F→A), row_to_response (E→A), extract_requirements (E→A)
- Dead Code: pca-platform, 7 Go-Handler, dsr_api.py, duplicate Schemas entfernt

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend-compliance/compliance/db/repository.py

@@ -3,6 +3,7 @@ Repository layer for Compliance module.
 
 Provides CRUD operations and business logic queries for all compliance entities.
 """
+from __future__ import annotations
 
 import uuid
 from datetime import datetime, date
@@ -17,7 +18,8 @@ from .models import (
     EvidenceDB, RiskDB, AuditExportDB,
     AuditSessionDB, AuditSignOffDB, AuditResultEnum, AuditSessionStatusEnum,
     RegulationTypeEnum, ControlDomainEnum, ControlStatusEnum,
-    RiskLevelEnum, EvidenceStatusEnum, ExportStatusEnum
+    RiskLevelEnum, EvidenceStatusEnum, ExportStatusEnum,
+    ServiceModuleDB, ModuleRegulationMappingDB,
 )
 
 
@@ -447,7 +449,7 @@ class ControlRepository:
             self.db.query(ControlDB)
             .filter(
                 or_(
-                    ControlDB.next_review_at == None,
+                    ControlDB.next_review_at is None,
                     ControlDB.next_review_at <= datetime.utcnow()
                 )
             )
@@ -936,7 +938,7 @@ class ServiceModuleRepository:
         """Get all modules with filters."""
         from .models import ServiceModuleDB, ServiceTypeEnum
 
-        query = self.db.query(ServiceModuleDB).filter(ServiceModuleDB.is_active == True)
+        query = self.db.query(ServiceModuleDB).filter(ServiceModuleDB.is_active)
 
         if service_type:
             query = query.filter(ServiceModuleDB.service_type == ServiceTypeEnum(service_type))
@@ -990,8 +992,7 @@ class ServiceModuleRepository:
 
     def get_overview(self) -> Dict[str, Any]:
         """Get overview statistics for all modules."""
-        from .models import ServiceModuleDB, ModuleRegulationMappingDB
-        from sqlalchemy import func
+        from .models import ModuleRegulationMappingDB
 
         modules = self.get_all()
         total = len(modules)
@@ -1035,7 +1036,6 @@ class ServiceModuleRepository:
 
     def seed_from_data(self, services_data: List[Dict[str, Any]], force: bool = False) -> Dict[str, int]:
         """Seed modules from service_modules.py data."""
-        from .models import ServiceModuleDB
 
         modules_created = 0
         mappings_created = 0